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This also removes the dependency on the Floating Action Button
and sets the accessibility text for the Select All, Undo and
Search buttons.

Bug: 876823, 860467
Change-Id: I1fc2758ddb72db133bf489ef7a0f71783b5d2ac9
Reviewed-on: https://chromium-review.googlesource.com/1190342Reviewed-by: Theresa <twellington@chromium.org>
Commit-Queue: Finnur Thorarinsson <finnur@chromium.org>
Cr-Commit-Position: refs/heads/master@{#586734}